反应详情

温度

-78 °C

To a solution of 2-methoxy-6-(4-methoxyphenyl)-1-bromonaphthalene (1.28 g, 3.72 mmol) in THF (25 mL) at −78° C. was slowly added n-butyl lithium (1.9 mL of 2.5 N in hexanes). The resulting solution was stirred at −78° C. for thirty minutes and a solution of N-fluorobenzenesulfonimide (1.40 g, 4.5 mmol) in THF (10 mL) was added. After 2 additional hr at −78° C., the reaction was warmed to room temperature, poured in water, and extracted with ethyl acetate (2×250 mL). The combined organic layers were washed with water, dried over sodium sulfate, filtered, evaporation of the solvent, and purification by silica chromatography (5% THF—hexanes) yielded 0.66 g (63%) of a white solid: mp 150-155° C.; 1H NMR (CDCl3): δ 3.88 (3H, s), 4.04 (3H, s), 7.02 (2H, d, J=8.69 Hz), 7.28-7.34 (1H, m), 7.62-7.67 (3H, m), 7.74 (1H, dd, J=1.60 Hz, J=8.79 Hz), 7.93 (1H, s), 8.09 (1H, d, J=8.77 Hz).

1. customat −78° C.
2. temperatureAfter 2 additional hr at −78° C., the reaction was warmed to room temperature
3. extractionextracted with ethyl acetate (2×250 mL)
4. washThe combined organic layers were washed with water
5. dry with materialdried over sodium sulfate
6. filtrationfiltered
7. customevaporation of the solvent, and purification by silica chromatography (5% THF—hexanes)